alfalfa.split.plot: An agricultural split plot design
Description
An experiment was conducted in Iowa in 1944 to see how different varieties of alfalfa responded
to the last cutting day of the previous year (Snedecor and Cochran 1967). We know that in the
fall alfalfa can either continue to grow, or stop growing and store resources belowground in roots
for growth during the following year. Thus, we might expect that later cutting dates inhibits
growth for the following year. On the other hand, if plants are cut after they have gone into
senescence, there should be little effect on productivity during the following year. There are
two factors: 1) variety of alfalfa (three varieties were planted in each of three randomly chosen whole plots),
and 2) the date of last cutting (Sept 1, Sept. 20, or Oct. 7). The dates were randomly
chosen split plots within the whole plots. Replication was accomplished using six blocks of fields.Usage
data(alfalfa.split.plot)
source
Snedecor, G. W. and Cochran, G. C. (1967) Statistical methods, 6th edition. Iowa State University Press.